$ git clone -n https://src.fedoraproject.org/rpms/ugrep.git /var/lib/mock/f41-build-832832-157689/root/chroot_tmpdir/scmroot/ugrep
Cloning into '/var/lib/mock/f41-build-832832-157689/root/chroot_tmpdir/scmroot/ugrep'...
$ git fetch origin d2ff654bbe2e7e07f04bcdbade63a05254527432:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ugrep
 * [new ref]         d2ff654bbe2e7e07f04bcdbade63a05254527432 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2ff654 Update to version 6.3.0 rhbz#2302179