$ git clone -n https://src.fedoraproject.org/rpms/rust-xkbcommon.git /var/lib/mock/f39-build-2199442-51741/root/chroot_tmpdir/scmroot/rust-xkbcommon
Cloning into '/var/lib/mock/f39-build-2199442-51741/root/chroot_tmpdir/scmroot/rust-xkbcommon'...
$ git fetch origin 0f05dd4a716b7f932e532844e6d8d1211c7aeb27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-xkbcommon
 * [new ref]         0f05dd4a716b7f932e532844e6d8d1211c7aeb27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f05dd4 Update to 0.7.0 (rhbz#2251774)