$ git clone -n https://src.fedoraproject.org/rpms/isync.git /var/lib/mock/f41-build-857201-167965/root/chroot_tmpdir/scmroot/isync
Cloning into '/var/lib/mock/f41-build-857201-167965/root/chroot_tmpdir/scmroot/isync'...
$ git fetch origin 43a542fdf9c40dcb4829b34097c24979ce546ba7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/isync
 * [new ref]         43a542fdf9c40dcb4829b34097c24979ce546ba7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43a542f Apply post-1.5.0 fixes from master branch: