$ git clone -n https://src.fedoraproject.org/rpms/oxygen-gtk2.git /var/lib/mock/f41-build-side-1-2650277-27574/root/chroot_tmpdir/scmroot/oxygen-gtk2
Cloning into '/var/lib/mock/f41-build-side-1-2650277-27574/root/chroot_tmpdir/scmroot/oxygen-gtk2'...
$ git fetch origin 0796615aa9698a2b0271714a4eed14dd7de9b5fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oxygen-gtk2
 * [new ref]         0796615aa9698a2b0271714a4eed14dd7de9b5fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0796615 convert license to SPDX