$ git clone -n https://src.fedoraproject.org/rpms/GtkAda.git /var/lib/mock/f38-build-side-42-init-devel-888088-28506/root/chroot_tmpdir/scmroot/GtkAda
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-888088-28506/root/chroot_tmpdir/scmroot/GtkAda'...
$ git fetch origin 4ecbb5c897973ec791c5995f1ad49b47c875ae2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/GtkAda
 * [new ref]         4ecbb5c897973ec791c5995f1ad49b47c875ae2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ecbb5c Adapted to backward compatibility breakage in uname.