$ git clone -n https://src.fedoraproject.org/rpms/rust-pretty-bytes.git /var/lib/mock/f45-build-43983-809/root/chroot_tmpdir/scmroot/rust-pretty-bytes
Cloning into '/var/lib/mock/f45-build-43983-809/root/chroot_tmpdir/scmroot/rust-pretty-bytes'...
$ git fetch origin b38758e4885bfcea112d948675dd887c342364d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pretty-bytes
 * [new ref]         b38758e4885bfcea112d948675dd887c342364d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b38758e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild