$ git clone -n https://src.fedoraproject.org/rpms/golang-github-martini.git /var/lib/mock/f45-build-12203-439/root/chroot_tmpdir/scmroot/golang-github-martini
Cloning into '/var/lib/mock/f45-build-12203-439/root/chroot_tmpdir/scmroot/golang-github-martini'...
$ git fetch origin 365bfdc53a7250233e667376199c815cac846dc4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-martini
 * [new ref]         365bfdc53a7250233e667376199c815cac846dc4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 365bfdc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild