$ git clone -n https://src.fedoraproject.org/rpms/gtk3.git /var/lib/mock/f40-build-787469-134776/root/chroot_tmpdir/scmroot/gtk3
Cloning into '/var/lib/mock/f40-build-787469-134776/root/chroot_tmpdir/scmroot/gtk3'...
$ git fetch origin 386570529a3a8f490ca1ba1b94803db68c08f52b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk3
 * [new ref]         386570529a3a8f490ca1ba1b94803db68c08f52b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3865705 Update to 3.24.41