$ git clone -n https://src.fedoraproject.org/rpms/golang-github-edsrzf-mmap.git /var/lib/mock/f45-build-11870-435/root/chroot_tmpdir/scmroot/golang-github-edsrzf-mmap
Cloning into '/var/lib/mock/f45-build-11870-435/root/chroot_tmpdir/scmroot/golang-github-edsrzf-mmap'...
$ git fetch origin 7a47502c7aa75837026e762d5fd960789e48e528:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-edsrzf-mmap
 * [new ref]         7a47502c7aa75837026e762d5fd960789e48e528 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a47502 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild