$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-TempDir.git /var/lib/mock/f41-build-side-1-2774786-32365/root/chroot_tmpdir/scmroot/perl-Test-TempDir
Cloning into '/var/lib/mock/f41-build-side-1-2774786-32365/root/chroot_tmpdir/scmroot/perl-Test-TempDir'...
$ git fetch origin bf7fd1d31d43fe2383b724e0c9bd00c2bbbc9671:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-TempDir
 * [new ref]         bf7fd1d31d43fe2383b724e0c9bd00c2bbbc9671 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf7fd1d convert GPL+ or Artistic license to SPDX