$ git clone -n https://src.fedoraproject.org/rpms/rust-rustls.git /var/lib/mock/f45-build-44555-815/root/chroot_tmpdir/scmroot/rust-rustls
Cloning into '/var/lib/mock/f45-build-44555-815/root/chroot_tmpdir/scmroot/rust-rustls'...
$ git fetch origin eecf3d4efcc4d0dbef4c10315fe139e067a7d290:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustls
 * [new ref]         eecf3d4efcc4d0dbef4c10315fe139e067a7d290 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eecf3d4 Update to version 0.24.43