$ git clone -n https://src.fedoraproject.org/rpms/golang-github-charlievieth-fastwalk.git /var/lib/mock/f45-build-11804-435/root/chroot_tmpdir/scmroot/golang-github-charlievieth-fastwalk
Cloning into '/var/lib/mock/f45-build-11804-435/root/chroot_tmpdir/scmroot/golang-github-charlievieth-fastwalk'...
$ git fetch origin 588aef9d4dcbec8289b9214350a884db2b374bfd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-charlievieth-fastwalk
 * [new ref]         588aef9d4dcbec8289b9214350a884db2b374bfd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 588aef9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild