$ git clone -n https://src.fedoraproject.org/rpms/umockdev.git /var/lib/mock/f41-build-side-1-2671148-29085/root/chroot_tmpdir/scmroot/umockdev
Cloning into '/var/lib/mock/f41-build-side-1-2671148-29085/root/chroot_tmpdir/scmroot/umockdev'...
$ git fetch origin b2abc1895cf33a980fb91238d4e4059664f0269f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/umockdev
 * [new ref]         b2abc1895cf33a980fb91238d4e4059664f0269f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2abc18 Update to 0.18.4 upstream release