$ git clone -n https://src.fedoraproject.org/rpms/rust-ptyprocess.git /var/lib/mock/f38-build-side-43-rust-devel-1418750-31459/root/chroot_tmpdir/scmroot/rust-ptyprocess
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1418750-31459/root/chroot_tmpdir/scmroot/rust-ptyprocess'...
$ git fetch origin ec2f1562560c960599ae278b67a9954a2bbe53f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ptyprocess
 * [new ref]         ec2f1562560c960599ae278b67a9954a2bbe53f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec2f156 Initial package