$ git clone -n https://src.fedoraproject.org/rpms/golang-github-rogpeppe-fastuuid.git /var/lib/mock/f45-build-12390-442/root/chroot_tmpdir/scmroot/golang-github-rogpeppe-fastuuid
Cloning into '/var/lib/mock/f45-build-12390-442/root/chroot_tmpdir/scmroot/golang-github-rogpeppe-fastuuid'...
$ git fetch origin 18a361d5d77fc775361c267808b4beb7b0b2910a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-rogpeppe-fastuuid
 * [new ref]         18a361d5d77fc775361c267808b4beb7b0b2910a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18a361d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild