$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-grape.git /var/lib/mock/f42-build-3275509-41321/root/chroot_tmpdir/scmroot/gap-pkg-grape
Cloning into '/var/lib/mock/f42-build-3275509-41321/root/chroot_tmpdir/scmroot/gap-pkg-grape'...
$ git fetch origin c5937e22764a0628c077bee9ea108b8a8d03dd52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-grape
 * [new ref]         c5937e22764a0628c077bee9ea108b8a8d03dd52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5937e2 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild