$ git clone -n https://src.fedoraproject.org/rpms/emacs-common-tuareg.git /var/lib/mock/f40-build-2209259-52150/root/chroot_tmpdir/scmroot/emacs-common-tuareg
Cloning into '/var/lib/mock/f40-build-2209259-52150/root/chroot_tmpdir/scmroot/emacs-common-tuareg'...
$ git fetch origin 275b3babe64d746b9106ab421177541610750308:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-common-tuareg
 * [new ref]         275b3babe64d746b9106ab421177541610750308 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 275b3ba Bump release and rebuild