$ git clone -n https://src.fedoraproject.org/rpms/python-specfile.git /var/lib/mock/f39-build-1426306-31590/root/chroot_tmpdir/scmroot/python-specfile
Cloning into '/var/lib/mock/f39-build-1426306-31590/root/chroot_tmpdir/scmroot/python-specfile'...
$ git fetch origin e7faa88397c61464fb2973896e1cdc245ab8d374:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-specfile
 * [new ref]         e7faa88397c61464fb2973896e1cdc245ab8d374 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7faa88 [packit] 0.22.1 upstream release