$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-smallgrp.git /var/lib/mock/f40-build-2722142-73090/root/chroot_tmpdir/scmroot/gap-pkg-smallgrp
Cloning into '/var/lib/mock/f40-build-2722142-73090/root/chroot_tmpdir/scmroot/gap-pkg-smallgrp'...
$ git fetch origin f7014be2f37a2d8f211fc093ab128b2469e09457:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-smallgrp
 * [new ref]         f7014be2f37a2d8f211fc093ab128b2469e09457 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7014be Rebuild for gap 4.13.0