$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-singular.git /var/lib/mock/f41-build-side-1-2957335-35598/root/chroot_tmpdir/scmroot/gap-pkg-singular
Cloning into '/var/lib/mock/f41-build-side-1-2957335-35598/root/chroot_tmpdir/scmroot/gap-pkg-singular'...
$ git fetch origin a0a030bad1ac18187c2e6cddb19ea911a572f832:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-singular
 * [new ref]         a0a030bad1ac18187c2e6cddb19ea911a572f832 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a0a030b Support the bigint, bigintvec, and bigintmat types