$ git clone -n https://src.fedoraproject.org/rpms/golang-github-mattn-colorable.git /var/lib/mock/f45-build-12215-439/root/chroot_tmpdir/scmroot/golang-github-mattn-colorable
Cloning into '/var/lib/mock/f45-build-12215-439/root/chroot_tmpdir/scmroot/golang-github-mattn-colorable'...
$ git fetch origin 1962d73fdaaef31984f8168c92c332748394a41e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-mattn-colorable
 * [new ref]         1962d73fdaaef31984f8168c92c332748394a41e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1962d73 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild