$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-fining.git /var/lib/mock/f38-build-side-42-init-devel-962816-28791/root/chroot_tmpdir/scmroot/gap-pkg-fining
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-962816-28791/root/chroot_tmpdir/scmroot/gap-pkg-fining'...
$ git fetch origin 7ed7a94703e15a27ad57d9347abccd8cc34e9c61:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-fining
 * [new ref]         7ed7a94703e15a27ad57d9347abccd8cc34e9c61 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ed7a94 Use the %gap_arches macro.