$ git clone -n https://src.fedoraproject.org/rpms/perl-Tree.git /var/lib/mock/f39-build-1439814-32287/root/chroot_tmpdir/scmroot/perl-Tree
Cloning into '/var/lib/mock/f39-build-1439814-32287/root/chroot_tmpdir/scmroot/perl-Tree'...
$ git fetch origin 31bc3d5751697dd328b0bc84d12d8f05fea56fcc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tree
 * [new ref]         31bc3d5751697dd328b0bc84d12d8f05fea56fcc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31bc3d5 Add TMT tests and gating