$ git clone -n https://src.fedoraproject.org/rpms/p11-kit.git /var/lib/mock/f40-build-786671-134489/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/f40-build-786671-134489/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin 4591e32cb1e546a082ad3d2cece04c3b6bb967a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/p11-kit
 * [new ref]         4591e32cb1e546a082ad3d2cece04c3b6bb967a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4591e32 import-object: Avoid integer truncation on 32-bit platforms