$ git clone -n https://src.fedoraproject.org/rpms/rust-rand_core0.5.git /var/lib/mock/f45-build-44233-811/root/chroot_tmpdir/scmroot/rust-rand_core0.5
Cloning into '/var/lib/mock/f45-build-44233-811/root/chroot_tmpdir/scmroot/rust-rand_core0.5'...
$ git fetch origin 45223decee14a939dc4d4834af65036fc38c89ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rand_core0.5
 * [new ref]         45223decee14a939dc4d4834af65036fc38c89ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45223de Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild