$ git clone -n https://src.fedoraproject.org/rpms/schismtracker.git /var/lib/mock/f45-build-35653-698/root/chroot_tmpdir/scmroot/schismtracker
Cloning into '/var/lib/mock/f45-build-35653-698/root/chroot_tmpdir/scmroot/schismtracker'...
$ git fetch origin ec288febc2560aa6ced4291215cac691677dc324:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/schismtracker
 * [new ref]         ec288febc2560aa6ced4291215cac691677dc324 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec288fe fix compilation on ppc64le