$ git clone -n https://src.fedoraproject.org/rpms/strace.git /var/lib/mock/f40-build-1453676-23577/root/chroot_tmpdir/scmroot/strace
Cloning into '/var/lib/mock/f40-build-1453676-23577/root/chroot_tmpdir/scmroot/strace'...
$ git fetch origin 5d8f4a13e8caad489d9e8e8ea748178345f96198:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/strace
 * [new ref]         5d8f4a13e8caad489d9e8e8ea748178345f96198 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d8f4a1 6.9-1