$ git clone -n https://src.fedoraproject.org/rpms/easyrpg-player.git /var/lib/mock/f42-build-side-1-3497636-45961/root/chroot_tmpdir/scmroot/easyrpg-player
Cloning into '/var/lib/mock/f42-build-side-1-3497636-45961/root/chroot_tmpdir/scmroot/easyrpg-player'...
$ git fetch origin ac699dd1a1f311d0a3c686dbb9c6e68aff7bc4a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/easyrpg-player
 * [new ref]         ac699dd1a1f311d0a3c686dbb9c6e68aff7bc4a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac699dd Update to v0.8.1