$ git clone -n https://src.fedoraproject.org/rpms/rust-proc-macro-utils.git /var/lib/mock/f45-build-44031-809/root/chroot_tmpdir/scmroot/rust-proc-macro-utils
Cloning into '/var/lib/mock/f45-build-44031-809/root/chroot_tmpdir/scmroot/rust-proc-macro-utils'...
$ git fetch origin 1b1889333a2db7c4430ca522580073f2dabe2a28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-proc-macro-utils
 * [new ref]         1b1889333a2db7c4430ca522580073f2dabe2a28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b18893 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild