$ git clone -n https://src.fedoraproject.org/rpms/rust-assert_cmd.git /var/lib/mock/f41-build-side-1-2803293-32817/root/chroot_tmpdir/scmroot/rust-assert_cmd
Cloning into '/var/lib/mock/f41-build-side-1-2803293-32817/root/chroot_tmpdir/scmroot/rust-assert_cmd'...
$ git fetch origin dab93ce40d283fee0dcbe1c4c442f2528f73eed1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-assert_cmd
 * [new ref]         dab93ce40d283fee0dcbe1c4c442f2528f73eed1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dab93ce Update to version 2.0.16; Fixes RHBZ#2303814