$ git clone -n https://src.fedoraproject.org/rpms/rust-jiff-core.git /var/lib/mock/f45-build-42743-796/root/chroot_tmpdir/scmroot/rust-jiff-core
Cloning into '/var/lib/mock/f45-build-42743-796/root/chroot_tmpdir/scmroot/rust-jiff-core'...
$ git fetch origin 57f5e59471c97bd277ce3e87c0f576f1d01a77b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-jiff-core
 * [new ref]         57f5e59471c97bd277ce3e87c0f576f1d01a77b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57f5e59 Initial package (close RHBZ#2502265)