$ git clone -n https://src.fedoraproject.org/rpms/golang-github-d2g-dhcp4.git /var/lib/mock/f45-build-11847-435/root/chroot_tmpdir/scmroot/golang-github-d2g-dhcp4
Cloning into '/var/lib/mock/f45-build-11847-435/root/chroot_tmpdir/scmroot/golang-github-d2g-dhcp4'...
$ git fetch origin 49ddd22fe92add69cf3dd520e450920b18a9df24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-d2g-dhcp4
 * [new ref]         49ddd22fe92add69cf3dd520e450920b18a9df24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49ddd22 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild