$ git clone -n https://src.fedoraproject.org/rpms/libbs2b.git /var/lib/mock/f40-build-786040-134149/root/chroot_tmpdir/scmroot/libbs2b
Cloning into '/var/lib/mock/f40-build-786040-134149/root/chroot_tmpdir/scmroot/libbs2b'...
$ git fetch origin 6a13825ec3e0a3430ee95a18585f08cc57118745:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libbs2b
 * [new ref]         6a13825ec3e0a3430ee95a18585f08cc57118745 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a13825 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild