$ git clone -n https://src.fedoraproject.org/rpms/rust-rbw.git /var/lib/mock/f41-build-846648-163162/root/chroot_tmpdir/scmroot/rust-rbw
Cloning into '/var/lib/mock/f41-build-846648-163162/root/chroot_tmpdir/scmroot/rust-rbw'...
$ git fetch origin 8632a1551c62b5cec90251fdb6190ca18f1fc124:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rbw
 * [new ref]         8632a1551c62b5cec90251fdb6190ca18f1fc124 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8632a15 Update to version 1.12.1; Fixes: RHBZ#2300468