$ git clone -n https://src.fedoraproject.org/rpms/rust-typetag-impl.git /var/lib/mock/f45-build-45829-828/root/chroot_tmpdir/scmroot/rust-typetag-impl
Cloning into '/var/lib/mock/f45-build-45829-828/root/chroot_tmpdir/scmroot/rust-typetag-impl'...
$ git fetch origin 06099cef5810de4404b6b6fd2c5b7a7d9318c8ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-typetag-impl
 * [new ref]         06099cef5810de4404b6b6fd2c5b7a7d9318c8ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06099ce Update to version 0.2.23; Fixes RHBZ#2480028