$ git clone -n https://src.fedoraproject.org/rpms/guile22.git /var/lib/mock/f41-build-845965-162880/root/chroot_tmpdir/scmroot/guile22
Cloning into '/var/lib/mock/f41-build-845965-162880/root/chroot_tmpdir/scmroot/guile22'...
$ git fetch origin 0780fc29de088a9ad470d2dbbb5750f9ee44387e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guile22
 * [new ref]         0780fc29de088a9ad470d2dbbb5750f9ee44387e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0780fc2 Rebuilt to regain libguile-2.2.so.1 RPM Provides