$ git clone -n https://src.fedoraproject.org/rpms/teckit.git /var/lib/mock/f40-build-2043107-48596/root/chroot_tmpdir/scmroot/teckit
Cloning into '/var/lib/mock/f40-build-2043107-48596/root/chroot_tmpdir/scmroot/teckit'...
$ git fetch origin bcd594d6e0f537b46250888895f2e67e353070d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/teckit
 * [new ref]         bcd594d6e0f537b46250888895f2e67e353070d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcd594d 2.5.12 bump