$ git clone -n https://src.fedoraproject.org/rpms/rust-ouroboros.git /var/lib/mock/f45-build-43619-804/root/chroot_tmpdir/scmroot/rust-ouroboros
Cloning into '/var/lib/mock/f45-build-43619-804/root/chroot_tmpdir/scmroot/rust-ouroboros'...
$ git fetch origin acc22e860f1126c942a7e63b63be9b295cbf99a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ouroboros
 * [new ref]         acc22e860f1126c942a7e63b63be9b295cbf99a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at acc22e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild