$ git clone -n https://src.fedoraproject.org/rpms/libgudev.git /var/lib/mock/f39-build-1518296-35807/root/chroot_tmpdir/scmroot/libgudev
Cloning into '/var/lib/mock/f39-build-1518296-35807/root/chroot_tmpdir/scmroot/libgudev'...
$ git fetch origin f95d49ec328703fd821d646dd40cca28b7b4458a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgudev
 * [new ref]         f95d49ec328703fd821d646dd40cca28b7b4458a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f95d49e migrate to SPDX license format