$ git clone -n https://src.fedoraproject.org/rpms/rust-jpeg-decoder.git /var/lib/mock/f45-build-42749-796/root/chroot_tmpdir/scmroot/rust-jpeg-decoder
Cloning into '/var/lib/mock/f45-build-42749-796/root/chroot_tmpdir/scmroot/rust-jpeg-decoder'...
$ git fetch origin c45136e741c9abde7ac533f488ffa23bfc823525:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-jpeg-decoder
 * [new ref]         c45136e741c9abde7ac533f488ffa23bfc823525 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c45136e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild