$ git clone -n https://src.fedoraproject.org/rpms/rust-procs.git /var/lib/mock/f38-build-side-43-rust-devel-1401313-31168/root/chroot_tmpdir/scmroot/rust-procs
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1401313-31168/root/chroot_tmpdir/scmroot/rust-procs'...
$ git fetch origin 876e50b98e9016cf81641e2d775baf95275c14a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-procs
 * [new ref]         876e50b98e9016cf81641e2d775baf95275c14a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 876e50b Update to version 0.14.0; Fixes RHBZ#2112181