$ git clone -n https://src.fedoraproject.org/rpms/xorg-x11-proto-devel.git /var/lib/mock/f45-build-39021-731/root/chroot_tmpdir/scmroot/xorg-x11-proto-devel
Cloning into '/var/lib/mock/f45-build-39021-731/root/chroot_tmpdir/scmroot/xorg-x11-proto-devel'...
$ git fetch origin e830e192e31d7fefaf6cf70f96c99e5e59ec5c01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xorg-x11-proto-devel
 * [new ref]         e830e192e31d7fefaf6cf70f96c99e5e59ec5c01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e830e19 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild