$ git clone -n https://src.fedoraproject.org/rpms/umockdev.git /var/lib/mock/f39-build-1531741-36215/root/chroot_tmpdir/scmroot/umockdev
Cloning into '/var/lib/mock/f39-build-1531741-36215/root/chroot_tmpdir/scmroot/umockdev'...
$ git fetch origin ee7096e124049679a3bb5a823f75ada2a3d5f49c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/umockdev
 * [new ref]         ee7096e124049679a3bb5a823f75ada2a3d5f49c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee7096e [packit] 0.17.18 upstream release