$ git clone -n https://src.fedoraproject.org/rpms/unison.git /var/lib/mock/f41-build-854315-166841/root/chroot_tmpdir/scmroot/unison
Cloning into '/var/lib/mock/f41-build-854315-166841/root/chroot_tmpdir/scmroot/unison'...
$ git fetch origin c68e5fa8cab0362d2ea8e7bac3c29fa9dd42abac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unison
 * [new ref]         c68e5fa8cab0362d2ea8e7bac3c29fa9dd42abac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c68e5fa Add package Requires for GDK Pixbuf XPM image loader module