$ git clone -n https://src.fedoraproject.org/rpms/rust-bitmaps.git /var/lib/mock/f45-build-40438-772/root/chroot_tmpdir/scmroot/rust-bitmaps
Cloning into '/var/lib/mock/f45-build-40438-772/root/chroot_tmpdir/scmroot/rust-bitmaps'...
$ git fetch origin 9c3a46cd19880aa0f4d47425eabbf87dcb59f542:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bitmaps
 * [new ref]         9c3a46cd19880aa0f4d47425eabbf87dcb59f542 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c3a46c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild