$ git clone -n https://src.fedoraproject.org/rpms/golang-github-mitchellh-colorstring.git /var/lib/mock/f45-build-12247-440/root/chroot_tmpdir/scmroot/golang-github-mitchellh-colorstring
Cloning into '/var/lib/mock/f45-build-12247-440/root/chroot_tmpdir/scmroot/golang-github-mitchellh-colorstring'...
$ git fetch origin 094f0e6c997f901f936b348cf6a6450e6447f9c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-mitchellh-colorstring
 * [new ref]         094f0e6c997f901f936b348cf6a6450e6447f9c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 094f0e6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild