$ git clone -n https://src.fedoraproject.org/rpms/xclock.git /var/lib/mock/f40-build-2045464-48795/root/chroot_tmpdir/scmroot/xclock
Cloning into '/var/lib/mock/f40-build-2045464-48795/root/chroot_tmpdir/scmroot/xclock'...
$ git fetch origin f67ad0889fcc5ac7f7c118f3e5c04bb22d450cae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xclock
 * [new ref]         f67ad0889fcc5ac7f7c118f3e5c04bb22d450cae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f67ad08 SPDX migration