$ git clone -n https://src.fedoraproject.org/rpms/graphite2.git /var/lib/mock/f40-build-2209827-52168/root/chroot_tmpdir/scmroot/graphite2
Cloning into '/var/lib/mock/f40-build-2209827-52168/root/chroot_tmpdir/scmroot/graphite2'...
$ git fetch origin 2ee02f99d60b651c9809621c08fd453ad3437be7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/graphite2
 * [new ref]         2ee02f99d60b651c9809621c08fd453ad3437be7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ee02f9 Migrate to SPDX license expression