$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-irredsol.git /var/lib/mock/f40-build-2664393-67053/root/chroot_tmpdir/scmroot/gap-pkg-irredsol
Cloning into '/var/lib/mock/f40-build-2664393-67053/root/chroot_tmpdir/scmroot/gap-pkg-irredsol'...
$ git fetch origin 33bb8c6b037991b5ba5a408d36396952b553deb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-irredsol
 * [new ref]         33bb8c6b037991b5ba5a408d36396952b553deb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33bb8c6 Rebuild for gap 4.13.0