$ git clone -n https://src.fedoraproject.org/rpms/rust-trustfall.git /var/lib/mock/f45-build-45755-825/root/chroot_tmpdir/scmroot/rust-trustfall
Cloning into '/var/lib/mock/f45-build-45755-825/root/chroot_tmpdir/scmroot/rust-trustfall'...
$ git fetch origin b42d145f6956e45a19fb6a53bf2dbd09331c40e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-trustfall
 * [new ref]         b42d145f6956e45a19fb6a53bf2dbd09331c40e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b42d145 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild