$ git clone -n https://src.fedoraproject.org/rpms/golang-github-denisbrodbeck-machineid.git /var/lib/mock/f45-build-20099-565/root/chroot_tmpdir/scmroot/golang-github-denisbrodbeck-machineid
Cloning into '/var/lib/mock/f45-build-20099-565/root/chroot_tmpdir/scmroot/golang-github-denisbrodbeck-machineid'...
$ git fetch origin 9e9a6fb42942afbebb183246cc855c0c29b1d978:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-denisbrodbeck-machineid
 * [new ref]         9e9a6fb42942afbebb183246cc855c0c29b1d978 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e9a6fb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild