$ git clone -n https://src.fedoraproject.org/rpms/rust-safe-transmute.git /var/lib/mock/f45-build-44682-816/root/chroot_tmpdir/scmroot/rust-safe-transmute
Cloning into '/var/lib/mock/f45-build-44682-816/root/chroot_tmpdir/scmroot/rust-safe-transmute'...
$ git fetch origin 1a8741eba4b1d0633ffa94031712c95808d19ee3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-safe-transmute
 * [new ref]         1a8741eba4b1d0633ffa94031712c95808d19ee3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a8741e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild