$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-grpconst.git /var/lib/mock/f38-build-side-42-init-devel-576629-26000/root/chroot_tmpdir/scmroot/gap-pkg-grpconst
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-576629-26000/root/chroot_tmpdir/scmroot/gap-pkg-grpconst'...
$ git fetch origin efae4ca7b02be7a6dbbf4cf2c2dfbc401dfe6b60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-grpconst
 * [new ref]         efae4ca7b02be7a6dbbf4cf2c2dfbc401dfe6b60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at efae4ca Version 2.6.4.