$ git clone -n https://src.fedoraproject.org/rpms/rust-x11rb-protocol.git /var/lib/mock/f45-build-46275-832/root/chroot_tmpdir/scmroot/rust-x11rb-protocol
Cloning into '/var/lib/mock/f45-build-46275-832/root/chroot_tmpdir/scmroot/rust-x11rb-protocol'...
$ git fetch origin 898222956037b66d99fe84a48b653e1b12f9b5c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-x11rb-protocol
 * [new ref]         898222956037b66d99fe84a48b653e1b12f9b5c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8982229 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild