$ git clone -n https://src.fedoraproject.org/rpms/rust-snapbox.git /var/lib/mock/f40-build-1905990-25074/root/chroot_tmpdir/scmroot/rust-snapbox
Cloning into '/var/lib/mock/f40-build-1905990-25074/root/chroot_tmpdir/scmroot/rust-snapbox'...
$ git fetch origin 0a28c8d0d3ec6b4b6fe8f1ccda329906b10f07bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-snapbox
 * [new ref]         0a28c8d0d3ec6b4b6fe8f1ccda329906b10f07bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a28c8d Update to version 0.6.16; Fixes RHBZ#2296998