$ git clone -n https://src.fedoraproject.org/rpms/yosyshq-abc.git /var/lib/mock/f40-build-2206927-52070/root/chroot_tmpdir/scmroot/yosyshq-abc
Cloning into '/var/lib/mock/f40-build-2206927-52070/root/chroot_tmpdir/scmroot/yosyshq-abc'...
$ git fetch origin 73f5b43213b8353abb8b5455d19efa0bd4098e0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yosyshq-abc
 * [new ref]         73f5b43213b8353abb8b5455d19efa0bd4098e0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73f5b43 update to 0.35