$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-atlasrep.git /var/lib/mock/f39-build-1569106-37697/root/chroot_tmpdir/scmroot/gap-pkg-atlasrep
Cloning into '/var/lib/mock/f39-build-1569106-37697/root/chroot_tmpdir/scmroot/gap-pkg-atlasrep'...
$ git fetch origin f62f4bae93e5d93bc0da065b3796220234b55a43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-atlasrep
 * [new ref]         f62f4bae93e5d93bc0da065b3796220234b55a43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f62f4ba Version 2.1.7