$ git clone -n https://src.fedoraproject.org/rpms/gstreamermm.git /var/lib/mock/f41-build-812102-147693/root/chroot_tmpdir/scmroot/gstreamermm
Cloning into '/var/lib/mock/f41-build-812102-147693/root/chroot_tmpdir/scmroot/gstreamermm'...
$ git fetch origin 77bcd0f9e80d79f990f586d7496cfee6d4f323f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamermm
 * [new ref]         77bcd0f9e80d79f990f586d7496cfee6d4f323f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77bcd0f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild