$ git clone -n https://src.fedoraproject.org/rpms/rust-adler32.git /var/lib/mock/f45-build-39987-765/root/chroot_tmpdir/scmroot/rust-adler32
Cloning into '/var/lib/mock/f45-build-39987-765/root/chroot_tmpdir/scmroot/rust-adler32'...
$ git fetch origin 80f1775a3c8faf01b05b4b9ecc8eb95cfccd78ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-adler32
 * [new ref]         80f1775a3c8faf01b05b4b9ecc8eb95cfccd78ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80f1775 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild