$ git clone -n https://src.fedoraproject.org/rpms/umockdev.git /var/lib/mock/f40-build-804472-144533/root/chroot_tmpdir/scmroot/umockdev
Cloning into '/var/lib/mock/f40-build-804472-144533/root/chroot_tmpdir/scmroot/umockdev'...
$ git fetch origin 063acd3cac0963548194b8b120af6d721677ad4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/umockdev
 * [new ref]         063acd3cac0963548194b8b120af6d721677ad4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 063acd3 [packit] 0.18.1 upstream release