$ git clone -n https://src.fedoraproject.org/rpms/rust-hayro-jpeg2000.git /var/lib/mock/f45-build-45156-821/root/chroot_tmpdir/scmroot/rust-hayro-jpeg2000
Cloning into '/var/lib/mock/f45-build-45156-821/root/chroot_tmpdir/scmroot/rust-hayro-jpeg2000'...
$ git fetch origin 5903ef67e9f1c1994a993b4e010e4577e618f31c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hayro-jpeg2000
 * [new ref]         5903ef67e9f1c1994a993b4e010e4577e618f31c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5903ef6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild