$ git clone -n https://src.fedoraproject.org/rpms/rust-ghost.git /var/lib/mock/f40-build-2137273-50825/root/chroot_tmpdir/scmroot/rust-ghost
Cloning into '/var/lib/mock/f40-build-2137273-50825/root/chroot_tmpdir/scmroot/rust-ghost'...
$ git fetch origin de74d16e1c7c36e3ca3596063e1a32700c7de61a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ghost
 * [new ref]         de74d16e1c7c36e3ca3596063e1a32700c7de61a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de74d16 Update to version 0.1.16; Fixes RHBZ#2247386