$ git clone -n https://src.fedoraproject.org/rpms/rust-psl.git /var/lib/mock/f45-build-44088-810/root/chroot_tmpdir/scmroot/rust-psl
Cloning into '/var/lib/mock/f45-build-44088-810/root/chroot_tmpdir/scmroot/rust-psl'...
$ git fetch origin 2f86e3d02283607d4ba7ca1594059beb308b5c00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-psl
 * [new ref]         2f86e3d02283607d4ba7ca1594059beb308b5c00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f86e3d Update to version 2.1.232; Fixes RHBZ#2527235